Planooraph co



D. BEHTHELO'T AND H. 1. F. GUILBAUD.`

' PUMP.

APPLlcAloN FILED FEB.I1. |919.

1,3 1 1,035. Pafemed'July 22, 1919.

THB COLUMBIA PMNOURAPH C0., wAsHxNuToN, D c.

A,at Paris and Meudon, Republic of France,`respectively, have in- `andthe like,

UNITED sTATEs PATENT oEEmE.

DANIEL BERTI-IELOT, 0F PARIS, AND HENRI J'.l F. GUILBAUI), OF MEUDON,FRANQE.

PUMP.

Application led February 11, 1919. Sera1No.i276,426.

To all whom z' may concern:

Be it known that we, DANIEL BERTHELoT and HENRI JEAN FREDERICK GUILBAUD,both citizens of the Republic of France, residing Seine et Oise, in thevented a certain new and useful Pump,of which the following is aspecification.

This invention relates to anv improved suction and delivery pump capableof operating in any position and adapted for use with any kindofliquids.

The pump of this invention delivers, proportionately to the `speed atwhich it is operated, a strictly regulatedvolume of liquid: furthertheoutput of liquid may be stopped, increased or diminishedduring theworking of the pump lever.

The improved pump is particularly applicable in all cases where greatregularity is required, more particularly with a small output. It may beemployed in installations requiring a circulation of as well as forfeeding petrol,- paraflim-heavy oil,-`motorspirit and the like. Itisalso adapted to be used for regulating the concentration of baths inchemical operations. y

' It is obvious that the dimensions of the constituent parts of ths pumpmay `vary according to the purpose to which it is applied and the natureof the materials employedin its manufacture may be varied as desired.For chemical products it must be made so as not to be attacked by theselatter.

The invention is more particularly illustrated with reference to theaccompanying drawing, which is a part sectional `view of one form of theimproved pump.

The driving shaft 1 operates the pump by means of a cam or eccentric 2through a connecting rod 4 which communicates a relever 3 pivoted i Thepiston I has a part `z' which moves into Specication of Letters Patent.

by the operation of a simple s water, oil, acids Patented July 22, 1919.

the piston D. This part z' is provided with a slot l through whichpasses a pin E the ends of which are xed in the wall of the piston D.Between this latter and the piston I a helical spring C is arrangedwhich is always 1n compression.

The space F existing between the pistons D and I constitutes thedelivery chamber ofthe pump, and may communicate on the one hand withthe delivery pipe V, which has a non-return valve R controlled by acompression spring 1'. It also communicates by means of ports Gr withthe interior ofthe piston I. These ports may be uncovered or closed inorder to permit or interrupt this communication by the operation of aclosing member J controlled by spring K.

The spring K abuts against a ca e K1 arranged near the suction port Xand 1n the i interior of which two valves are arranged viz a suctionvalve M with a spring m and a valve T with spring t enabling the liquidto be forced to the feed reservoir as will be hereinafter explained.

Between the body of the pump and the cage K1 a washer L is interposedintended to limit the downward course `of the piston I. The working 2ofthe improved pump will now beeasily understood.

In the accompanying drawing, the movable parts of this pump are shown inthe position which they occupy at the end of a ydelivery stroke and atthe commencement of a suction stroke.

f The lever 3 actuated by the control mechanism draws the cap or buttend A and the piston D outward which moves away from the piston I untilthe pin E, sliding in the Islot 1, comes in contact with the bottom ofthe latter which is near the end of the parti ofthe piston I.

From this moment the piston I exactly follows the `movement communicatedto the piston D, and, yin being displaced, it removes completely theports G from the closing member J.

During this period the liquid is drawn up the pipe X which is incommunication with the feed reservoir, and passes through the cage K1,flifting the valve M, through the interior ofthe piston I and fills thespace F constituting the delivery chamber of the pump.

The suction stroke is then terminated and a delivery stroke commences.The lever 3 presses the cap A and the piston D toward the interior: thespring C, act'ng on the part vl, at the same time moves the piston I inthe same direction. This latter first bears against the plug J which isdisplaced in its turn, compressing the spring K and closes the ports Grthereby interrupting communication between the feed and the deliverychamber F. The movement of the pistons D and I continuing, the latterthen bears against the washer L. At this moment the actual deliverycommences because the piston D, in approaching the piston I, expels theliquid retained in the chamber F forcing it through the v( lve R in thepipe V The delivery7 period being completed, a fresh suction period isproduced and so on in succession.

It should be noticed that during the suction stroke an excess of liquidpasses through the cage K1, while during the first portion of thedelivery stroke, when the pistons D and I are returning together, thisexcess of liquid is forced back toward the feed reservoir,

through the said cage K1 the valve T of which lifts for this purpose.

It is evident that to any given stroke of the piston D regulatedby themovement of the lever 3, there will be a corresponding Volume of liquiddelivered and one which is equzl to the difference of capacity of thechamber F, considered at the moment when the piston I comes in contactwith the washer L and the capacity at the end of the actual delivery.

By varying the stroke of the piston D, the output of the pump is variedat the same time, proportionately to the speed imparted by the controlmechanism to the lever 3.

The accompanying drawing shows, by way of example, one arrangementwhereby the stroke of the piston D and consequently the output of thepump, can be varied at will and at any moment by simply operating` alever Q it being evident that any other suitable method of carrying thisout may be adopted instead and in place of this arrangement.

By means of this lever. Q, the position of the shaft 5 about which thelever 3 which actuates the pump pivots, may be changed. By moving thepoints 5 and 6 toward one another the stroke of the piston D is reducedand consequently the output of the pump: on the contrary by moving thesepoints apart the stroke of the piston D is increased and also the outputof the pump.

Tc attain this object, the shaft 5 is carried on a sleeve 7 which isadapted to slide along the lever 3 and is mounted freely in a support 8having socket 81 sliding on a fixed rod 9. The operating lever Q ispivoted on the one hand to the socket 81 and on the other hand to aconnecting rod l0 movable about a fixed point 11.

It is evident that on a displacement of the lever Q, in one direction orthe other, a corresponding displacement, in the same direction, of thesupporting socket 81 and consequently of the shaft 5 on which the lever3 is pivoted, will take place.

This arrangement maybe combined with the pump to be integral with it.

lFrom the above, it is evident that the plug J, subjected to the actionof the spring K, must be regulated so as to close the ports G a littlebefore the piston I has come in contact with the washer L. Thisadjustment can be effected by means of nuts N. In its raction the plug Jmay play another part to that which has been hereinbefore assigned toit. In fact it constitutes an actual safety valve, the pressure of thespring K being consequently regulated in case the delivery port V shouldbe closed for any reason. In this even, the Aliquid contained in thedelivery chamber F, when the pistons D and I approach one another, willlift the plug J and be forced back toward the feed reservoir. y

In certain cases it may be necessary to place the delivery pipe V indirect communication with the feed pipe X. In order to attain thisresult with this improved pump, it is suiicient to lift the plug J fromits seat. For this purpose, a button or stud U is provided actuating, bymeans of a rod u passing through a stuffing box P, a cam O intended toact on a small plate o carried by the rod or stem j of the plug J. Owingto this arrangement by suitably operating the stud U, the plug J may bedisplaced so that the ports G are always uncovered even when the pump isat the end of a delivery stroke.

When the feed reservoir is under pressure or is at the same level oreven at a level slightly lower than that of the pump, the cage K1 andits valves M and T may be dispensed with without affecting the properaction of the pump.

The improved pump may be completed by the addition of an air chamber S,arranged on the delivery pipe V, to regulate the output and to convertanintermittent delivery into a constant delivery.

The improved pump is very suitablefor feeding petrol or other likemotors, the de livery pipe V being simply connected with a nozzle orvaporizer and thus the feed of several cylinders with a single pump maybe insured. The pump being a suction pump enables the motor or motors tobe fed with a reservoir placed at .a lower level without it beingnecessary to place thisreservo-ir under pressure. This arrangement maybe applied to existing motors without introducing any modificationtherein.

vVhile the pumps at present employed do not give satisfactory resultsfor a small output, this improved pumpfhasa great ad* vantage offurnishing with absolute regularity a ,veryvlsmallidelivery of liquid ora very largeone, as desired, with an invariably strictly regulatedoutput, owing to the combination of two pistons of unequal stroke, thiscombin-ation 'beingl -such I that even 4with a maximum output a greatervolume of liquid is aspirateduthan the volume of liquiddelivered,`the"`ei'cess of a'spirated'liquid being automaticallyreturned to the feed resen' voir at each cycle of action of the pistons.

The improved pump acts after the manner of a pump with a plungingpiston, which insures its correct operation, in spite of the wear whichmay be produced after a time in the pistons or on the walls.

This pump does not require lubrication.

We declare that what we claim is zl. A pump comprising in combination acasing, a delivery piston therein, -a suction piston connected with lostmotion to said delivery piston and means to reciprocate one of saidpistons.

2. A pump comprising in combination a casing, a delivery piston therein,a suction piston connected with lost motion to saiddelivery piston andmeans to reciprocate the delivery piston.

\ 3. A pump comprising in combination a casing, a delivery pistontherein, a suction piston connected with lost motion to said deliverypiston and means to adjust the strokes of said pistons.

4. A pump comprising in combination a cylinder, a pair of pistons intandem therein, lost motion connection between said pistons, means toreciprocate one piston and delivery and suction passages connected tothe-bottom of the two pistons respectively.

5. A pump comprising in combination a cylinder a pair of pistons in-tandem therein, a lost motion connection between them, a springconnection between them, inlet and outlet passages connected to the endsof said pistons, and means to reciprocate one of said pistons.

6. A pump comprising in combination a cylinder a delivery pistontherein, a suction piston in tandem with it and having transfer passagesin it, a delivery passage connected to said cylinder, a spring loadedvalve cooperating with said transfer passages when the suction pistonmoves against it, an inlet passage connected to the cylinder at thebottom of the suction piston and means to reciprocate said deliverypiston.

7. A pump comprising in combination a cylinder a delivery pistontherein, a suction pist-on in tandem with it and having transferpassages in it, a delivery passage connected to said cylinder, a springloaded valve cooperating with said transfer passages when the suctionpiston moves against it,

8. A pump comprisingfin combination a cylinder a delivery pistontherein, a suction piston in tandem with it and having transfer`passages in it, a delivery passage connected to said cylinder, a springloaded valve coperating with said transfer passages when the suctionpiston moves against it, an inlet passage connected to the cylinder atthe bottom of the suction piston, a cage in said delivery passage, oneway valves opening in opposite directions and mounted in said cage.

9. A pump comprising in combination a cylinder a delivery pistontherein, a suction piston in tandem with it and having transfer passagesin it, a delivery passage connected to said cylinder, a spring loadedvalve cooperating with said transfer passages `when the suction pistonmoves against it, an inlet passage connected to the cylinder at thebottom of the suction piston and means to remo-ve said spring loadedvalve permanently out of range of said suction piston in its stroke.

1.0. A pump comprising in combination a v lcasing a delivery pistontherein, a suction piston connected with lost motion to said deliverypiston, a lever, a reciprocating element connected thereto, a pivotcarrying said lever, means connecting said lever with a piston, a slide,and means to displace said pivot along said slide to alter the effectivelength of said lever.

13. A pump comprising in combination a casing, a delivery pistontherein, a suction piston connected with lost motion to said deliverypiston, a lever of the second order, a reciprocating element connectedthereto, a pivot carrying said lever, means connecting said lever with apiston, a slide, and means to displace said pivot along said slide toalter the effective length of said lever.

14. A pump comprising in combination a casing, a delivery pistontherein, a suction piston connected with lost motion yto Vsaid deliverypiston, a lever, a reciprocating eley inent connected thereto, a` pivotcarryingy 1919, in the presence of two-subscribing Witsaid lever, meansconnecting said lever with nesses.

a piston, a slide, and means to displace said pivot along said slide toalter the effective JBEFRTIEUD length of said lever, and a pivotedcontrol handle displacing said pivot along said slide. Witnesses:

In Witness whereof, We have hereunto ALPHONSE STEFAN, signed our namesthis 21st day of January JOHN F. SIMONS.

Copies of this patent may be obtained for ve eents each, by addressingthe Gommissiner of Iatents, Washington, D. C.

